hyatt



4 Sheets-Sheet 1.

(No Model.) I. S. HYATT.

APPARATUS FOR MOLDING OELLULOID AND ANALOGOUS PLASTIG MATERIAL. No.275,216. Patented Apr. 3. 1883.

QJV

776772 aid/e4,- fiwenibr N. PETERS. Plmw-L'nm n her, wanin mn. D. t. A

(NoModeL) 1 4 Sheets -Sheet 3.

I. S. HYATT. APPARATUS FOR MOLDING GELLULOID AND ANALOGOUS PLASTICMATERIAL.- No. 275,216. Patented Apr. 3. 1883.

,1 mliwsws; v Jmwnzm 0 M mbdj (No Model.) 4 Sheets-Sheet 4. I. S HYATT.

APPARATUS FOR MOLDING CELLULOID AND ANALOGOUS PLASTIC v MATERIAL. No.275,216. Patented Apr.3 ,1883.

Jyz. 4'

' WZZ IZIJJZZ' fizz/22279? UNITED STATES ,ATE T FFICE.

ISAIAH S. HYATT, OF MORRISTOVVN, NEW JERSEY, ASSIGNOR TO THE GELLULOIDMANUFACTURING COMPANY, OF NEW? YORK, N. Y.

APPARATUS FOR MOLDING CELLULOID AND ANALOGOUS PLASTIC MATERIAL.

SPECIFICATION forming part of Letters Patent No. 275,216, dated April 3,1883,

Application filed January 523, 1883.

To all whom it may concern:

Be it known that I, ISAIAH SMITH HYATT, a citizen of the United States,,residing at Morristown, in the county of Morris and State of NewJersey, have invented certain new and useful Improvements in Apparatusfor Molding Celluloid and Analogous Plastic Material; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappe'rtains to make and use the same.

The invention relates to an improvement in processes and apparatus forthe manufacture of sheets of celluloid and analogous plastic material,and especially to an adaptation of the principles of the process andapparatus illustrated in Letters Patent No. 199,908, granted to John W.Hyatt,'February 5, 1878. By the method described in said patent thematerial is placed in a chase having a bottom of peculiar construction,-and submitted to a hydraulic press having a platen of proper size toenter between the sides and ends of the chase and press the plasticmaterial into a solid slab. The chase is then taken from the hydraulicpress, its sides and ends are removed, leaving the slab of materialclinging to the bottom of the chase, after which the block is placed ona planing-machine and reduced to sheets of any desired thickness, all asdescribed in said patent.

By my invention 1 simplify the process and apparatus for forming theslab of material, and afi'ord a means of producing a number of suchslabs at one operation of the hydraulic press.

' After the slabs of material have been formed according to my inventionthey may be sub- 'tion, wherein- Figure 1 is a perspective view of anapparatus embodying the invention. Fig. 2 is a perspective view of oneof the interior sec- (No model-l tions thereof. Fig. 3 isacentralvertical transverse section through theapparatus. Fig.4.is a centralvertical longitudinal section through the same. Fig. 5 is a view of asheet of zinc hereinafter mentioned. Fig. 6 is a detached view of theindependent grooved base-plate. Fig. 7 is a centralv vertical transversesection of one of the interior parts of the apparatus, showing thegrooved plate in position; and Fig. 8 is an enlarged detached view of amodified form of apparatus hereinafter described.

The apparatus shown is in the nature of a die or mold made in sectionsand capable of use for molding or forming several slabs at one operationof the press. \Vith slight modifications it may be made to form a numberof articles of the same or varied contour from any material whichbecomes plastic under heat and which will assume form when subjected topressure.

Each of the interior sections (lettered A) of the apparatus consists ofthe base-plate B, having upward]y-projectingsides C anddownwardly-extending ends D, which sides and ends will be ofsuchproportions that thei'ornier will receive at the inner corners of theirends the downwardly-projecting ends of the next superimposed section A,and that the said downwardly-extending ends D first mentioned will fitagainst the inner corners of the extremities of the next lower sectionA. Thus when the sections A are arranged one over the other the innercorners of the upwardly-extending sides and of the downwardly-projectingends will meet and inolose the material to be treated. It will beobserved that the base of one section and its depending ends serve asthe top and ends for the section beneath it, and that when a number ofthe sections are arranged one over the other in the manner specifiedmatrices E will be formed between them, in which the material may begiven form. The upper section, A, of the apparatus will have noupwardly-projecting sides, but only the r downwardly-extended ends D,and the lower section, A, of the apparatus will have only the sides 0.Thus it will be noted that the apparatus will have a plain upper andlower surface, and that its matrices E are all inclosed.

In the drawings I have illustrated an apparatus in which three interiorsections and an upper and lower section are employed, and in theemployment of such a construction I secure four matrices, in which thematerial may be molded at one operation, each matrix being entirelyinclosed and having no communication with those adjacent to it. Ofcourse any number of sections may be madeuse of, as may be desired.

In the employment of the apparatus the material to be treated is placedbetween the sides of the lower section and the first interior sectionplaced over it. Then this interior section is filled with the materialand another section, which is subsequently filled, placed over it, andso on until all the sections contain the material, when the top sectionis placed in position, and at this time the apparatus may be submittedto the press and the material molded.

Various methods of constructing the sections of the die will suggestthemselves; but I recommend that each section be .cast in one piece withhollow or cored sides, ends, and bottom, for the purpose of receiving aheating or cooling agent, as indicated in Figs. 3, 4, 7, and 8 of thedrawings. The application of the heating or cooling agent to the hollowsides and bottom of the mold or die is substantially the same as thatdescribed in said Letters Patent No. 199,908, and will be fullyunderstood by those skilled in the art to which the invention relateswithout a more detailed explanation.

When it is not desired to attach the slab of material to the base of themold, and to permit the ready removal of the block of molded materialfrom the sections A, it will simply be necessary to place on the base ofeach section a sheet of zinc, or, of appropriate size, upon which theblock or slab may be formed, and which may be easily withdrawn from thedie after its removal from the press. It is necessary to secure theblock of material to the bedplate ofthe planing-machine when it isdesired to form the sheets, and as a conveniemt means for enabling theoperator to attach the said block or slab to the planing-machine Iattach the same by heat and pressure upon an independent plate, H,provided with grooves or projections in the customary way, whichindependent plate may be directly secured to the bed of theplaning-machine; or, in lieu of thus securing the slab of material onthe planer, I may substitute the independent plate H for the sheet ofzinc .r, and when this is done the slab of material, upon its removalfrom the die,will be found to be firmly attached to the plate, and inproper condition to be at once submitted to the planing-machine. In thismanner the dies or molds are always kept incondition for molding newblocks or slabs, and there is no unnecessary time or labor expended insubmitting the slabs to the planer.

The apparatus illustrated is specially adapted for molding material intoslabs or blocks of rectangular form; but it is obvious that the materialmay be given varied form by appropriately constructing the interior ofthe sections composing the die or mold according to the particularconfiguration to be produced.

In the foregoing description I have set out the preferred embodiment ofmy invention, but it is obvious that various constructions may beproduced which will form an apparatus such as that hereinbeforedescribed, in which several blocks, slabs, or other articles may beformed at one operation.

In Fig. 8 of the drawings I illustrate in a detached sectional view aconstruction which may be employed with good results. In thisconstruction the sides and ends are detachable from the base, and theirrelation to each other and to the base will be preserved by plates toand bolts 11, as indicated. The edges of the base-plates a willpreferably be grooved, as at d, to receive the edges of the sides andcndsof the sections, and the parts of the apparatus will also bypreference be cast hollow or cored out, as indicated, to receive andpermit the passage through the same of heating or cooling agents; but itis not essential that all of the parts be hollow, the essentialconsideration being only that they be so arranged and constructed thatthe proper degree of heat can be effectually applied.

Instead of employing the inclined grooves in the plate H, the uppersurface of said plate may be constructed in other ways, as set forth insaid Letters Patent No. 199,908, the only essential condition being thatthe surface to be utilized in holding the block be such as to effectthat result. I prefer to use a plate that is grooved, but do not limitmyselfto any particular construction. It is obvious, too, that the platemay be supplemented by mechanical agencies, so that even if the adhesionbe insufficient to hold the block so that it can be planed, unless suchagencies be added, the principal object of the invention will beeffected. Thus I have found that even if the upper surface of the plateis very slightly roughened it can be used with satisfactory results whenintelligently employed. It will only be necessary in such cases, toinsure a satisfactory result,to secure the edges ofthe block or slab,the adhesion accomplished by the pressure being suificient to prevent adislocation of the body of the block by its separation from the plate,and, if the roughening be sufficient, it will operate quite assatisfactorily as other expedients. Nevertheless, I recommend theemployment of the plate H in the form and manner hereinbefore set forthas being especially conducive to good results.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. A die or mold formed of sections, each of the interior of whichconsists of a base having sides and endsprojectingin opposite directionstherefrom, the whole forming adie or apparatus adapted to mold two ormore articles at one operation,flubstantially as set forth.

2. A. die or'mold consisting of interior see- ICO tions having a base,and sides and ends projecting in opposite directions therefrom, and atop and bottom section having a plain exterior surface, substantially asset forth.

3. The section A, consisting of a base having ends and sides projectingin opposite directions therefrom, and supplied with atop and bottomsection having projecting ends or sides, respectively, and adapted tocomplete the mold or die, substantially as set forth.

4. A die or mold for forming plastic material, having detachable sidesor ends, and a removable bed-plate carrying the molded material,substantially as set forth.

5. A die or mold for molding plastic material, having detachable sidesor ends, and a removable base-plate upon which the material is caused toadhere by the application of heat and pressure, substantially as setforth.

In testimony whereofI affix my signature in 0 presence of two witnesses.

ISAIAH SMITH HYATT. Witnesses:

Carts. 0. GILL, HERMAN GUSTOW.

